Superconducting state in YSn3 with a AuCu3-type structure

K. Kawashima; M. Maruyama; M. Fukuma; J. Akimitsu

doi:10.1103/PhysRevB.82.094517

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Superconducting state in YSn3 with a AuCu3-type structure

K. Kawashima, M. Maruyama, M. Fukuma, J. Akimitsu

DOI 10.1103/PhysRevB.82.094517 · Physical Review B

T1

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Abstract

In this paper, the superconducting properties of YSn3 are reported. YSn3 has a cubic AuCu3-type structure with the space group Pm3¯m. Magnetic susceptibility, electrical resistivity, and specific-heat data showed that YSn3 is a superconductor with a superconducting transition temperature (Tc) of 7 K. The magnetization versus magnetic field (M−H) curve shows the typical type-II superconducting behavior. The estimated lower critical field Hc1(0) and the upper critical field Hc2(0) are about 90 Oe and 3000 Oe, respectively. The penetration depth λ(0) and coherence length ξ(0) are calculated to be approximately 270 nm and 66 nm, respectively, using the Ginzburg-Landau equations. The estimated Sommerfeld coefficient γN is 7.57 mJ/mol K2. The normalized specific heat jump ΔC/γNTc is estimated to be about 2.19, which is higher than the value predicted by the BCS theory in the weak-coupling limit, i.e., ΔC/γNTc=1.43. This fact indicates that superconductivity in YSn3 exists in the strong-coupling regime. The difference between Tc of LnX3 (X=family of 13 or 14 elements) compounds is discussed to compare their physical properties.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YSn3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	7	Pressure not reported	midpoint
YSn3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	7.3	Pressure not reported	onset
YSn3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	7	Pressure not reported	zero_resistance
YSn3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	7	Pressure not reported	midpoint
LaSn3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	6.25	Pressure not reported	unknown
YbSn3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	3.6	Pressure not reported	unknown
YIn3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	0.78	Pressure not reported	unknown
YTl3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	1.5	Pressure not reported	unknown
YPb3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	4.72	Pressure not reported	unknown
LaPb3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	4.1	Pressure not reported	unknown